Scraper-bucket.



J. P. HEWITT. BORAPER BUOKB'I'.

APPLIGATIOI FILED IELBI, 1911';

Patented 0m.24,1911.

3 SHEETS-SHEET 1.

J. F. HEWITT.

SORAPBR BUCKET.

APPLICATION FILED T11R21, 1911.

Patented Oct. 24, 1911.

3 SHEETBSHEET 2.

i H9 all whom it may concern:

UNITED sinrns PATENT OFFICE JOHN F. HEWITT, 0F PORTLAND, OREGON.

SCRAPER-BUCKET.

Specification of Letters Patent. Patented 24, 1911.

Application filed February 21, 1911. Serial No. 610,083.

Be it known that I, JGHN F. Hnwrrr, a citizen of the United States, residing at Portland, in the county of Multnomah and 1 State of Oregon, have invented certain new i and useful Improvements in scraper-Buckets, of which the following is a specifics-'1 tion.

from its carriage, will carry its mouth at a suflicient eievation to prevent escape of its i contents; and which, at the same time, when tripped will swing over to a distance that I will compel its evacuation taneous movement of the bucket, wheni tripped, and also a further swing on its, axis of rotation, than can be had in the buckets now in use.

A further object is to provide a bucket;v

which will drop onto the ound in such position that it will right itself ,automatically and which is matlc cleansing mec amsm.

rovided with an auto- I accomplish these objects by the mechanism illustrated in the accompanying drawmg, in which- 'gure 1 is a perspective elevation, showing the bucket in its normal position. Fig. 2 15 an elevation showing the bucket after being tripped. Fig. 3 is a detail sectional elevation of the tripping device. Fi 4 is a the portion 3 extends to its pivotal support 37, toward the rear and well toward the bottom of the bucket, and upon which also is secured the reinforcing member 36 across the rear of the bucket, which is provided with the forwardly projecting arms 36.

Near the median point of the part 3 is secured the bail 2 which rises over the body of the bucket and from its central point the riser'30 extends for engagement with the view of the den is link To the pull bail, at each side near the front edge of the bucket, is secured the transverse member 4 of a forward bail. Reinforccmcnts 5 and 5 are secured upon this member, which converge together and rise between the members of the channel iron 6 of the carriage, where'they are secured upon the pivot 19. Aperture is formed in the pull bail to facilitate engagement therewith.

The bucket is formed oi. sheet metal of the proper weight, and is provided with the fined straight bottom l, which extends back 0 a f to the beginning of the rounded back poi A further object is to secure an instantion, and has formed upon its front edge the teeth 33. The curved upper portion also is rovided with a fixed covering 1 made su ciently strong to sustain any strain upon the bucket, and to the top of which is secured the tripping mechanism.

At the rear edge of the floor 1 is hingcd'ly secured the back 40 of the bucket, bent to conform to the side members and made to fit snugly, between them. When the bucket is tripped, its forward motion will throw the hinged back forward, causin it to scrape the sides clean, and breakmg any accumulation which may have packed on the floor 1. Contact with the earth, in the succeeding forward pull of the bucket, at once restores the back to its normal position in the bucket, without inconvenience or loss oi time. I

The carriage consists of the channel irons 6, secured together upon the brackets 12. The front and back transverse bails being secured to their respective ends of the carriage, by the members 5 and 30. Apertures 25 are .formed in the channel irons for the back and forth adjustment of the rear bail, whereby the angle of the carriage with reference to the horizon, may be varied.

To the brackets 12 are secured the blocks 16, mounted to rotate laterally upon the rods or bearings 13. when the bucket is at rest and the cable is slackened. Within these blocks are mounted the pulley wheels 7 and 7 upon the shafts 11 and 11 respectively, by means oi which the carria is mounted on the cable 9, connected with a hoist.

At the rear side of the block 1'6 is mounted, upon the pivot 14:, a tri ger havin the rearward projection 1'5, in t lower si e of which is formed the box or bearing 17, to receive the journal of the tripper 39. This journal is mounted in line with shaft 13, so that when the pulley blocks rock on their bearings the trippcr also will rock in its hearing, so as to maintain the alinemenl of its members, for a purpose hereinafter described.

Longitudinally across the top of the bucket at its central portion, is secured a pair of angle irons 28, provided with apertures 32 to receive the pin 29. Upon the pin 29 is pivotally secured the lower end of the member 22 of the double link con nection, the member 21 thereof being pivoted at its upper end at 42, to the channel iron 6. These members 21 and 22 are formed of double angle irons,'the bottom being omitted, and are rectangular in cross section, as shown in Fig. 4, the end of the former fit zig within that of the latter. A transverse pin 23 is fixedly secured in member 21 and is free to move len thwise in the slot 41 of the member 22. A in 38 is provided across the upper side at the end of member 22, the purpose of which will appear later.

The body 18 of the tripper adjacent the journal 17 is bent obliquely downward tiLl it comes approximately to the center line of the double link 21-22 when it is again bent to stand. in line therewith, when the bucket is in loaded or normal position, the end 39 thereof standing against the bar The bucket having been loaded and conveyed to the roper point to deposit its contents, the ca le is set in motion in the direction of the arrow, when the stop 10 thereon contacting with the trigger 8, rocks it upon its shaft 14 carrying upward the end 39 of the tripper, causing the link 2122 to buckle upward, thereby removing the sup- 7 port which sustained the bucket in its normal position. It is therefore, then free to rock forward on its pivot 37 in response to its weight and that of its contents, which is heaviest to the front of the pivot. The slot 41 permits a wide swing of the bucket and the weight of the hinged back 40 renders the empt ing rapid and complete.

An in ependent mechanism may be provided. for operating the trigger 8, if desired, so that it may be entirely under the control of the operator.

When the bucket reaches the ground again, it always strikes upon the teeth 33 and its weight being at the rear from that point, it settles backward rotating on its pivot, and carryin the member 22 of the double link up within the guide way 24, and as it does so the cap 38 swings over the end 39 of the tripper, bringing it to its original position. To guarantee the latching of the bucket in each instance, there is dropped from the portion 18 of the tripper the depending member 20 between the channel irons 8 1n such position that it will always strike between the side members of the portion 21 of the double link, the end 39 will necessarily, therefore, come in line with the cap 38 of the member 22.

As the double link swings to position, it is so forlred that the pin 23 drops slightly below the line established by the pivots 29 and 42. It will therefore, resist all the strain applied upon the teeth 33, and will not permit the bucket to be discharged prematurely. In no case can the bucket be tripped until the pin 23 is raised above the line of the pivots 29 and 42, which is done only by operating the trigger 8.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. A scraper bucket comprising side members,a fixed bottom piece secured transversely at the front thereof,-a movable bottom member hingedly connected to said fixed bottom piece, mounted to vibrate longitudinally of the bucket,a'nd means to arrest said movable member atthe rear edge of the side members.

2. In combination with a carriage, a. scraper bucket having parallel side members,a fixed bottom piece at the front thereof,a movable bottom hingedly connected at the rear edge of the fixed member and mounted to swing longitudinally between the side members,p1'votal bearings secured to the side members for connection with the carriage,-and means upon the carriage for operating the bucket upon its bearings.

3. The combination in a scraper mechanism, of a carriage with a scraper bucket, a pull-bail embracing the front of said bucket and pivotally secured thereto at a point to the rear of and below its center,- a carrying bail uniting the front of the pull-bail with the front of the carriage and a similar bail uniting the rear of the carriage with an intermediate portion of the ull-bail,a double link ivotally connectmg the front of the hue et with the carriage,means upon the carriage for operating said link for dumping the bucket,--and means for controlling the angle of'rotation of the bucket on its pivotal support.

4. In a. scraper mechanism a carriage, a movable cable for supporting the carriage,a bucket pivotally supported from the carriage,-a tripping mechanism comprising a double link connecting the bucket and carriage,and means upon the cable for operating the tripping mechanism.

5. In a scraper mechanism, a carriage,- a bucket pivotally secured theretora double link pivotally connecting the bucket and carriage,-a tripFer comprising a. double lever, one end 0 which has a guide to a lever mounted on a pulle block, the

Y agement'with the double link,--and means journal thereof being inline Wit the mountor operating the ether end of the lever for ing of the pulley, whereby it will maintain 1 5 tripping the bucket. its alinement and by means of which the 5 6. A scrapei mechanism comprising a do'uble link is operated.

carriagle,pul1efy blocks secured ,to the up- In testimony whereof I affix my signature per si e threo and a bucket pivotally sef in presence of tW Witnesses.

.JOH N HEWITT.

meniber adapted to keep it in line'for ensured to the lower side,-a. double link pivotully connecting'the buckethnd cal-'riage, 10 u flipper engaging the double link and hav- \Vitnesses:

ing a guide arm depending through the Nmuns NV. YOUNG,

members thereof, which tripper is journaled l EDWIN E- HEC BERT- 

